Millions of Californians who had their Social Security numbers, home addresses and other personal information exposed in a 2017 security breach at credit-reporting company Equifax are eligible to file for a piece of a settlement worth up to $700 million that was reached between Equifax and the federal government.

California Attorney General Xavier Becerra said 15 million Californians are eligible to receive some of the approximately $18.7 million that the state will get as part of the deal between Atlanta-based Equifax and the Federal Trade Commission that was announced late Sunday. Claimants are eligible to file for a maximum claim of $20,000.

In a statement, Becerra called the Equifax hack “one of the most devastating data breaches to face our nation,” as more than 147 million Americans had their personal information exposed in the incident. Becerra’s office said the attorney general would hold a press conference about the Equifax settlement that will be livestreamed 9 a.m. in Sacramento.

According to the terms of the settlement, Equifax will establish a $300 million fund that could climb to as much as $425 million, pay $175 million in fines to individual states and pay an additional $50 million fine to the Consumer Financial Protection Board.

The deal stems from Equifax disclosing in 2017 that hackers had used a flaw in the company’s security systems to obtain information such as individuals’ names, Social Security numbers, birth dates, driver’s licence numbers and home addresses. The federal government said that hackers had access to the Equifax data for more than two months, and that the company didn’t disclose the breach until six weeks after learning of the matter. The incident led to then-Equifax Chief Executive Richard Smith, and several other executives, to resign from the company.

“Equifax failed to take basic steps that may have prevented the breach that affected approximately 147 million consumers,” said FTC Chairman Joe Simons, in a statement. “(This settlement will) ensure that consumers harmed by this breach can receive help protecting themselves from identity theft and fraud.”